840507-47-3Relevant articles and documents
Designing semiencapsulation based covalently self-healable poly(methyl methacrylate) composites by Atom Transfer Radical Polymerization
Saikia, Bhaskar Jyoti,Dolui, Swapan Kumar
, p. 1842 - 1851 (2016)
Self-healable poly(methyl methacrylate) (PMMA) composites were fabricated with embedded glycidyl methacrylate (GMA) encapsulated poly(melamine-formaldehyde) microcapsules. The matrix polymers were synthesized via Atom Transfer Radical Polymerization using two different initiators; one linear and another hexafunctional. As the so prepared polymer matrix retains living characteristics, it can initiate a healing reaction when the encapsulated monomer reaches the matrix due to formation or extension of a crack and thus healing the system covalently. The effect of number of initiating functionality on healing characteristic was studied using both linear and 6-armed star PMMA having same targeted molecular weight. Both the systems were able to restore 100% original fracture toughness after healing. However, the polymer matrix prepared by hexafunctional initiator restored the fracture toughness much faster than that of the linear polymer matrix.
ANTIVIRAL POLYMERS
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Paragraph 00160, (2021/11/26)
The present invention relates to polymer compounds that have antiviral activity. The compounds have the structural Formula I defined herein. The present invention also relates to processes for the preparation of these compounds, to compositions comprising
The behaviour of honeycomb film formation from star polymers with various fluorine content
Zhang, Zhou,Hughes, Timothy C.,Gurr, Paul A.,Blencowe, Anton,Uddin, Hemayet,Hao, Xiaojuan,Qiao, Greg G.
, p. 4446 - 4454 (2013/08/23)
A series of poly((1H,1H-pentafluoropropyl acrylate)-ran-(methyl methacrylate)) (poly(PFPA-ran-MMA)) star polymers with varying fluorine content were prepared via the core-first approach using atom-transfer radical polymerisation (ATRP). Subsequently, the star polymers were used to prepare honeycomb films on both planar and non-planar surfaces via the 'Breath Figures' technique using a static casting method. The fluorine content of the star polymers was observed to influence the morphology of the honeycomb structures and the formation of non-cracking honeycomb films on non-planar surfaces. Moreover, the average pore diameter of the honeycomb films was found to decrease with increasing fluorine content, as well as increasing polymer concentration in the casting solution or decreasing humidity during casting. The increasing fluorine content of the star polymers was also found to result in a decrease in their glass transition temperatures and Young's modulus values.
